Dwight f



(N0 Model.

D. P. WALBRIDGE.

- SLATE WIPER.

Patented Jan. 16,1883.

UNITED STATES PATENT OFFICE.

DWIGHT F. WALBRIDGE, OF BUFFALO, NEW YORK.

SLATE-WIPER.

SPECIFICATION forming part of Letters Patent No. 270,708, dated January 16, 1883.

- Application filed June 1, 882. (No model.)

To all whom it may concern Beit known that I, DWIGHT F. WALBRIDGE, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have made certain Improvements in Slate-Wipers, of which the following is a specification.

This invention relates to a slate-sponge and holder for school use more particularly; and the invention consists in the combination, in one device, of a wet and dry sponge connected to a combined handle and water-receptacle, keeping one sponge constantly moistened by anattached wick depending through a cork stopper in the handle, and to which the sponge is fastened. A dry sponge is cemented to the side of the holder or handle, for wiping dry after the wet sponge has been used, all as clearly hereinafter explained.

In thedrawings, Figure 1 is a vertical crosssection through the whole device; Fig. 2, an elevation of the whole.

A represents a hollow receptacle, round, square, or other suitable shape, having a stopper, B, of cork, set tightly in the top. To this stopper is cemented a sponge, O, and in its center is set a depending wick, a, of any suitable material, and which goes through the stopper, and hangs down into the receptacle A, which contains water. This wick a, by

capillary attraction, constantly draws up sufficient water to keep the sponge O moist; but no water can escape from the receptacle, as,

otherwise prepared toprevent water soaking through. This sponge O is used to wipe ofi' figures, 850., on the slate. On the side of the receptacle A, which is in fact also the handle of the whole, is cemented or otherwise fastened another sponge or wiper, D, which is always dry, having no connection with the inside of the box A. This is used to dry, by wipin g, the moisture on the slate left by sponge G. This is the whole'device. It is simple, cheap, handy, and extremely useful for the use of school-children or others. It is of small size, and can be attached to the slate, if desired, by a string. -It is to do away with. the

greasing of slates by spittingon them, and then wiping with the hands, sleeves, or handkerchief.

I claim The wiper constructed of and combining the hollow handle and water-receptacle A, sponge 0, attached to stopper B, and attached wick a, and. the wiper .or dry sponge D, fastened to the side ofhandle A, all substantially as and for the purpose specified.

In witness whereof I have hereunto signed DWIGHT F. WALBRIDGE.

WVitnesses:

J. R. DRAKE, (1H. KELLOGG. 

